Quick answers
- Is CVE-2026-38571 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-38571 being exploited in the wild.
- How severe is CVE-2026-38571?
- Informational severity, with a CVSS score of 6.8, published 26 June 2026.
- Which products and versions are affected?
- Tenda F3 V603 (eCos based).
- Is there a fix for CVE-2026-38571?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-38571 attacked?
- It is attacked with physical access, in a network appliance.
- Am I affected by CVE-2026-38571?
- Check whether you run Tenda F3 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The Tenda N300 F3 (firmware V603) router exposes an unauthenticated command-line console via the on-board UART serial header. This console lacks any login requirements, allowing a physically proximate attacker to access the device's boot logs and NVRAM, which contain WPA2 credentials in cleartext. Furthermore, the console provides 'rr' (read) and 'wr' (write) commands that allow for arbitrary 32-bit memory access without authentication. This can be exploited to modify device behavior or extract sensitive data from memory. As of the disclosure date, no patch is available.
Affected products
- Tenda Technology Co., Ltd. Wireless N300 Easy Setup Router F3 V603 (eCos based)
Timeline
- 2026-06-26: disclosed
- 2026-06-26: advisory